CVE-2020-5261: Missing Token Replay Detection in Saml2 Authentication services for ASP.NET

CVE-2020-5261 · Severity: low · CVSS 3.1 · Published 2020-03-25

Missing Token Replay Detection in Saml2 Authentication services for ASP.NET

Technologies: Sustainsys.Saml2 (NuGet). Vendors: NuGet.

Quick answers

Is CVE-2020-5261 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2020-5261 being exploited in the wild.
How severe is CVE-2020-5261?
Low severity, with a CVSS score of 3.1, published 25 March 2020.
Which products and versions are affected?
Sustainsys.Saml2 (NuGet) ECOSYSTEM:introduced=2.0.0,fixed=2.5.0.
Is there a fix for CVE-2020-5261?
Yes. Sustainsys.Saml2 (NuGet): upgrade to 2.5.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2020-5261?
Check whether you run Sustainsys.Saml2 (NuGet) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Sustainsys.Saml2 (NuGet): upgrade to 2.5.0 or later
    dotnet add package Sustainsys.Saml2 --version 2.5.0

Affected products

  • Sustainsys.Saml2 (NuGet) ECOSYSTEM:introduced=2.0.0,fixed=2.5.0

Identifiers

  • CVE-2020-5261
  • GHSA-g6j2-ch25-5mmv

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